PACs (polycylic aromatic compounds) are air pollutants formed in incomplete combustion, e.g., vehicle engines. Vegetation can potentially remove substantial amounts and act as bioindicators of these pollutants. Increased knowledge the pollutant removal efficiencies different tree species is essential for understanding potential benefits trees provide urban residents. We investigated leaf/needle...

BACKGROUND Untargeted metabolomics commonly uses liquid chromatography mass spectrometry to measure abundances of metabolites; subsequent tandem mass spectrometry is used to derive information about individual compounds. One of the bottlenecks in this experimental setup is the interpretation of fragmentation spectra to accurately and efficiently identify compounds. Fragmentation trees have beco...

levels as follows: (1) Separate gene trees are inferred from each linkage partition, and (2) the species phylogeny is then inferred from the set of gene trees. A method (Maddison, 1997; Page and Charleston, 1997a, 1997b; Slowinski et al., 1997) termed gene tree parsimony by Slowinski et al. (1997) is the appropriate method for implementing the second step. Gene tree parsimony operates by findin...

The intention of this review is to discuss floral initiation of horticultural trees. Floral initiation is best understood for herbaceous species, especially at the molecular level, so a brief overview of the control of floral initiation of Arabidopsis (Arabidopsis thaliana (L.) Heynh.) precedes the discussion of trees. Four major pathways to flowering have been characterized in Arabidopsis, inc...

Pleurostoma richardsiae is associated with host trunk diseases, known to cause dieback, cankers and wilting of woody trees, human infections. This fungus was isolated from wood tissues declining olive trees grapevines showing esca disease symptoms, in the Apulia region Italy. Fungus detection has been based on morphological molecular features, which are time-consuming identify require well-trai...

The Argania is an endemic genetic resource in Morocco holding an important ecological and socio-economical benefit. However, overgrazing and overharvesting lead to a serious downturn in the number of trees. To characterize genetic diversity within and among 24 populations, represented by 240 argan trees, four combinations of SRAP primers and eight combinations of REMAP primers were used. A tota...

In this paper we consider the problem of determining whether a given colored graph can be triangulated, such that no edges between vertices of the same color are added. This problem originated from the Perfect Phylogeny problem from molecular biology, and is strongly related with the problem of recognizing partial k-trees. In this paper we give a simple linear time algorithm that solves the pro...

The appearance of «dry» trees in rubber plantations and the development of Tapping Panel Dryness has been the subject of a considerable number of studies. The original causes of the disease have yet to be identified. Genetic factors at molecular level in the latex producing tissues determine susceptibility to tapping panel dryness. An experimental approach involves two-dimensional electrophores...

Effects of taxonomic sampling and conflicting signal on the inference of seed plant trees supported in previous molecular analyses were explored using 13 single-locus data sets. Changing the number of taxa in single-locus analyses had limited effects on log likelihood differences between the gnepine (Gnetales plus Pinaceae) and gnetifer (Gnetales plus conifers) trees. Distinguishing among these...